When I got my GPSMAP 60CSx I went against what seemed at the time like the majority opinion on GPS forums and got the City Navigator NT maps on the MicroSD card. My reasoning was that I only use one GPS at a time and it does contain ALL the maps for North America.

Recently I've read that Garmin is changing the DVD software so that it can only be used on one unit, which makes the choice of DVD vs. the MicroSD kind of a mute point.

Not sure which is best, but I like using the MicroSD. When at Glacier NP I had both the City Navigator NT MicroSD card and another card that held the entire West National Parks 24K topos (they all fit on a single MicroSD even usign the DVD). It was easy to flip between them AND I was able to use the City Navigator NT card on the entire train ride from Milwaukee to West Glacier (since it has the entire continent on it).

One of the goofy things about working with MicroSD cards is the difficulty of labeling such as tiny card. I used a extra fine-tip sharpie and just used abbreviations.

By the way, my 60CSx DOES have a selection for lithium batteries. Its a bummer they don't have that for the Vista HCx, though it is overcomable.

Ken